src/app/page.tsx

@@ -18,6 +18,7 @@ export default function LandingPage() {
   const [mounted, setMounted] = useState(false);
 
   useEffect(() => {
+    setMounted(true);
     const saved = localStorage.getItem('native-line-dark-mode');
     if (saved !== null) {
       setIsDarkMode(JSON.parse(saved));
@@ -25,7 +26,6 @@ export default function LandingPage() {
       const prefersDark = window.matchMedia('(prefers-color-scheme: dark)').matches;
       setIsDarkMode(prefersDark);
     }
-    setMounted(true);
   }, []);
 
   const toggleDarkMode = useCallback(() => {